1.3 Know Your Gate Driver: Delay Matching

Welcome to getting to know your gate driver. This is a multipart video series, where we will introduce important gate driver parameters, tell you why they are important, and how they can influence the systems around them.
Today's topic is delay matching. Delay matching is where the internal propagation delays between channels are matched. In other words, if the signal is simultaneously applied at the inputs of two channels, the time delay at the outputs of both channels is the delay matching specification. The smaller the delay matching spec, the better performing the gate driver. This feature can be found in both multichannel low-side drivers and half-bridge drivers.
There are two main benefits to delay matching. The first is it ensures parallelled MOSFETs are driven in a simultaneous fashion with minimum turn on delay difference. The other benefit is it eases paralleling of gate driver outputs to effectively double current capability and eases driving parallel power switches. This is most valuable for applications that require critical timing, like synchronous rectification and power factor correction. TI has a strong portfolio of gate drivers with delay matching.
Thanks for watching. For more info, visit ti.com/gatedrivers. 欢迎了解 栅极驱动器。 这是一个包含 多个部分的视频系列， 我们将介绍重要的 栅极驱动器参数， 告诉你为何这些参数重要， 以及它们如何影响 相关的系统。 今天的主题是延迟匹配。 延迟匹配是通道 之间的内部传播延迟 实现匹配的情况。 换句话说， 如果在两个通道的 输入端同时 施加信号， 两个通道的 输出端的时间延迟 即为延迟匹配 规格。 延迟匹配规格 越小， 栅极驱动器的 性能越好。 在多通道低侧驱动器 和半桥驱动器中 都存在这一特性。 延迟匹配有两个 主要优点。 第一个是 确保以最小 导通延迟差异 同时驱动 并联的 MOSFET。 另一个优点是它可以 简化栅极驱动器输出的 并联，以便有效地使 电流能力加倍， 并可以方便驱动 并联电源开关。 对于需要关键 时序的应用， 如同步整流和 功率因数校正， 这是最有价值的。 TI 拥有具备 延迟匹配功能的 强大栅极驱动器产品系列。 谢谢观看。 如需更多信息，请访问 ti.com/gatedrivers。